How to know which task failed and get stacktrace in finally block?

[XiaosongWen]

Hi I am building a pipeline to do some ops on github, currently my finally block is like this:

finally:
    - name: report-pipeline-failed-to-ghe
      when:
        - input: $(tasks.status)
          operator: in
          values: [ "Failed", "None" ]
      taskRef:
        name: github-set-status

I suppose this will be triggered when any of the task failed, but is there a way to know which specific task fail and get it's log (or maybe tracestack)?